dns.entunet.com has no CNAME records.
Question and response
Question
dig dns.entunet.com. NS
Answer
The response has no answer records.
Authority
entunet.com. 1669 SOA dns.entunet.com. hostmaster.entunet.com. 1831281231 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0